git.sur5r.net Git - openldap/blob - servers/slapd/back-ldbm/index.c

   1 /* index.c - routines for dealing with attribute indexes */
   2
   3 #include "portable.h"
   4
   5 #include <stdio.h>
   6
   7 #include <ac/string.h>
   8 #include <ac/socket.h>
   9
  10 #include "slap.h"
  11 #include "back-ldbm.h"
  12
  13 static int      add_value(Backend *be, struct dbcache *db, char *type, int indextype, char *val, ID id);
  14 static int      index2prefix(int indextype);
  15
  16 int
  17 index_add_entry(
  18     Backend     *be,
  19     Entry       *e
  20 )
  21 {
  22         Attribute       *ap;
  23         char            *dnval;
  24         struct berval   bv;
  25         struct berval   *bvals[2];
  26
  27         Debug( LDAP_DEBUG_TRACE, "=> index_add( %ld, \"%s\" )\n", e->e_id,
  28             e->e_dn, 0 );
  29
  30         /*
  31          * dn index entry - make it look like an attribute so it works
  32          * with index_add_values() call
  33          */
  34
  35         bv.bv_val = ch_strdup( e->e_dn );
  36         bv.bv_len = strlen( bv.bv_val );
  37         (void) dn_normalize_case( bv.bv_val );
  38         bvals[0] = &bv;
  39         bvals[1] = NULL;
  40
  41         /* add the dn to the indexes */
  42         index_add_values( be, "dn", bvals, e->e_id );
  43
  44         free( bv.bv_val );
  45
  46         /* add each attribute to the indexes */
  47         for ( ap = e->e_attrs; ap != NULL; ap = ap->a_next ) {
  48                 index_add_values( be, ap->a_type, ap->a_vals, e->e_id );
  49         }
  50
  51         Debug( LDAP_DEBUG_TRACE, "<= index_add( %ld, \"%s\" ) 0\n", e->e_id,
  52             e->e_dn, 0 );
  53         return( 0 );
  54 }
  55
  56 int
  57 index_add_mods(
  58     Backend     *be,
  59     LDAPModList *ml,
  60     ID          id
  61 )
  62 {
  63         int     rc;
  64
  65         for ( ; ml != NULL; ml = ml->ml_next ) {
  66                 LDAPMod *mod = &ml->ml_mod;
  67
  68                 switch ( mod->mod_op & ~LDAP_MOD_BVALUES ) {
  69                 case LDAP_MOD_ADD:
  70                 case LDAP_MOD_REPLACE:
  71                         rc = index_add_values( be, mod->mod_type,
  72                             mod->mod_bvalues, id );
  73                         break;
  74
  75                 case LDAP_MOD_DELETE:
  76                         rc = 0;
  77                         break;
  78                 }
  79
  80                 if ( rc != 0 ) {
  81                         return( rc );
  82                 }
  83         }
  84
  85         return( 0 );
  86 }
  87
  88 ID_BLOCK *
  89 index_read(
  90     Backend     *be,
  91     char        *type,
  92     int         indextype,
  93     char        *val
  94 )
  95 {
  96         struct dbcache  *db;
  97         Datum           key;
  98         ID_BLOCK                *idl;
  99         int             indexmask, syntax;
 100         char            prefix;
 101         char            *realval, *tmpval;
 102         char            buf[BUFSIZ];
 103
 104         ldbm_datum_init( key );
 105
 106         prefix = index2prefix( indextype );
 107         Debug( LDAP_DEBUG_TRACE, "=> index_read( \"%s\" \"%c\" \"%s\" )\n",
 108             type, prefix, val );
 109
 110         attr_masks( be->be_private, type, &indexmask, &syntax );
 111         if ( ! (indextype & indexmask) ) {
 112                 idl =  idl_allids( be );
 113                 Debug( LDAP_DEBUG_TRACE,
 114                     "<= index_read %lu candidates (allids - not indexed)\n",
 115                     idl ? ID_BLOCK_NIDS(idl) : 0, 0, 0 );
 116                 return( idl );
 117         }
 118
 119         attr_normalize( type );
 120         if ( (db = ldbm_cache_open( be, type, LDBM_SUFFIX, LDBM_WRCREAT ))
 121             == NULL ) {
 122                 Debug( LDAP_DEBUG_ANY,
 123                     "<= index_read NULL (could not open %s%s)\n", type,
 124                     LDBM_SUFFIX, 0 );
 125                 return( NULL );
 126         }
 127
 128         realval = val;
 129         tmpval = NULL;
 130         if ( prefix != UNKNOWN_PREFIX ) {
 131               unsigned int      len = strlen( val );
 132
 133               if ( (len + 2) < sizeof(buf) ) {
 134                         realval = buf;
 135                 } else {
 136                         /* value + prefix + null */
 137                         tmpval = (char *) ch_malloc( len + 2 );
 138                         realval = tmpval;
 139                 }
 140               realval[0] = prefix;
 141               strcpy( &realval[1], val );
 142         }
 143
 144         key.dptr = realval;
 145         key.dsize = strlen( realval ) + 1;
 146
 147         idl = idl_fetch( be, db, key );
 148       if ( tmpval != NULL ) {
 149               free( tmpval );
 150       }
 151
 152         ldbm_cache_close( be, db );
 153
 154         Debug( LDAP_DEBUG_TRACE, "<= index_read %lu candidates\n",
 155             idl ? ID_BLOCK_NIDS(idl) : 0, 0, 0 );
 156         return( idl );
 157 }
 158
 159 static int
 160 add_value(
 161     Backend             *be,
 162     struct dbcache      *db,
 163     char                *type,
 164     int                 indextype,
 165     char                *val,
 166     ID                  id
 167 )
 168 {
 169         int     rc;
 170         Datum   key;
 171         ID_BLOCK        *idl = NULL;
 172         char    *tmpval = NULL;
 173         char    *realval = val;
 174         char    buf[BUFSIZ];
 175
 176         char    prefix = index2prefix( indextype );
 177
 178         ldbm_datum_init( key );
 179
 180         Debug( LDAP_DEBUG_TRACE, "=> add_value( \"%c%s\" )\n", prefix, val, 0 );
 181
 182         realval = val;
 183         tmpval = NULL;
 184
 185         if ( prefix != UNKNOWN_PREFIX ) {
 186               unsigned int     len = strlen( val );
 187
 188               if ( (len + 2) < sizeof(buf) ) {
 189                         realval = buf;
 190                 } else {
 191                         /* value + prefix + null */
 192                         tmpval = (char *) ch_malloc( len + 2 );
 193                         realval = tmpval;
 194                 }
 195               realval[0] = prefix;
 196               strcpy( &realval[1], val );
 197         }
 198
 199         key.dptr = realval;
 200         key.dsize = strlen( realval ) + 1;
 201
 202         rc = idl_insert_key( be, db, key, id );
 203
 204         if ( tmpval != NULL ) {
 205                 free( tmpval );
 206         }
 207
 208         if( idl != NULL ) {
 209                 idl_free( idl );
 210         }
 211
 212         ldap_pvt_thread_yield();
 213
 214         /* Debug( LDAP_DEBUG_TRACE, "<= add_value %d\n", rc, 0, 0 ); */
 215         return( rc );
 216 }
 217
 218 int
 219 index_add_values(
 220     Backend             *be,
 221     char                *type,
 222     struct berval       **vals,
 223     ID                  id
 224 )
 225 {
 226         char            *val, *p, *code, *w;
 227         unsigned        i, j, len;
 228         int             indexmask, syntax;
 229         char            buf[SUBLEN + 1];
 230         char            vbuf[BUFSIZ];
 231         char            *bigbuf;
 232         struct dbcache  *db;
 233
 234         Debug( LDAP_DEBUG_TRACE, "=> index_add_values( \"%s\", %ld )\n", type,
 235             id, 0 );
 236
 237         attr_masks( be->be_private, type, &indexmask, &syntax );
 238         if ( indexmask == 0 ) {
 239                 return( 0 );
 240         }
 241
 242         if ( (db = ldbm_cache_open( be, type, LDBM_SUFFIX, LDBM_WRCREAT ))
 243             == NULL ) {
 244                 Debug( LDAP_DEBUG_ANY,
 245                     "<= index_add_values -1 (could not open/create %s%s)\n",
 246                     type, LDBM_SUFFIX, 0 );
 247                 return( -1 );
 248         }
 249
 250
 251         for ( i = 0; vals[i] != NULL; i++ ) {
 252                 /*
 253                  * presence index entry
 254                  */
 255                 if ( indexmask & INDEX_PRESENCE ) {
 256                         add_value( be, db, type, INDEX_PRESENCE, "*", id );
 257                 }
 258
 259                 Debug( LDAP_DEBUG_TRACE, "*** index_add_values syntax 0x%x syntax bin 0x%x\n",
 260                     syntax, SYNTAX_BIN, 0 );
 261                 if ( syntax & SYNTAX_BIN ) {
 262                         ldbm_cache_close( be, db );
 263                         return( 0 );
 264                 }
 265
 266                 bigbuf = NULL;
 267                 len = vals[i]->bv_len;
 268
 269                 /* value + null */
 270                 if ( len + 2 > sizeof(vbuf) ) {
 271                         bigbuf = (char *) ch_malloc( len + 1 );
 272                         val = bigbuf;
 273                 } else {
 274                         val = vbuf;
 275                 }
 276                 (void) memcpy( val, vals[i]->bv_val, len );
 277                 val[len] = '\0';
 278
 279                 value_normalize( val, syntax );
 280
 281                 /*
 282                  * equality index entry
 283                  */
 284                 if ( indexmask & INDEX_EQUALITY ) {
 285                         add_value( be, db, type, INDEX_EQUALITY, val, id );
 286                 }
 287
 288                 /*
 289                  * approximate index entry
 290                  */
 291                 if ( indexmask & INDEX_APPROX ) {
 292                         for ( w = first_word( val ); w != NULL;
 293                             w = next_word( w ) ) {
 294                                 if ( (code = phonetic( w )) != NULL ) {
 295                                         add_value( be, db, type, INDEX_APPROX,
 296                                             code, id );
 297                                         free( code );
 298                                 }
 299                         }
 300                 }
 301
 302                 /*
 303                  * substrings index entry
 304                  */
 305                 if ( indexmask & INDEX_SUB ) {
 306                         /* leading and trailing */
 307                         if ( len > SUBLEN - 2 ) {
 308                                 buf[0] = '^';
 309                                 for ( j = 0; j < SUBLEN - 1; j++ ) {
 310                                         buf[j + 1] = val[j];
 311                                 }
 312                                 buf[SUBLEN] = '\0';
 313
 314                                 add_value( be, db, type, INDEX_SUB, buf, id );
 315
 316                                 p = val + len - SUBLEN + 1;
 317                                 for ( j = 0; j < SUBLEN - 1; j++ ) {
 318                                         buf[j] = p[j];
 319                                 }
 320                                 buf[SUBLEN - 1] = '$';
 321                                 buf[SUBLEN] = '\0';
 322
 323                                 add_value( be, db, type, INDEX_SUB, buf, id );
 324                         }
 325
 326                         /* any */
 327                         for ( p = val; p < (val + len - SUBLEN + 1); p++ ) {
 328                                 for ( j = 0; j < SUBLEN; j++ ) {
 329                                         buf[j] = p[j];
 330                                 }
 331                                 buf[SUBLEN] = '\0';
 332
 333                                 add_value( be, db, type, INDEX_SUB, buf, id );
 334                         }
 335                 }
 336
 337                 if ( bigbuf != NULL ) {
 338                         free( bigbuf );
 339                 }
 340         }
 341         ldbm_cache_close( be, db );
 342
 343         return( 0 );
 344 }
 345
 346 static int
 347 index2prefix( int indextype )
 348 {
 349         int     prefix;
 350
 351         switch ( indextype ) {
 352         case INDEX_EQUALITY:
 353                 prefix = EQ_PREFIX;
 354                 break;
 355         case INDEX_APPROX:
 356                 prefix = APPROX_PREFIX;
 357                 break;
 358         case INDEX_SUB:
 359                 prefix = SUB_PREFIX;
 360                 break;
 361         default:
 362                 prefix = UNKNOWN_PREFIX;
 363                 break;
 364         }
 365
 366         return( prefix );
 367 }